Preliminary Phytochemical Screening and Antimicrobial Potentials of Different Extracts of Aegiceras corniculatam L. and Ceriops tagal Pers

The chloroform extract of A. corniculatam showed maximum zone of inhibition of 13 mm against S. dysenteriae and S. cervaceae. Furthermore, the aqueous extract of A. corniculatam showed maximum antibacterial activity with 10 mm zone of inhibition against P. aeruginosa & S. dysenteriae. However, n-hexane, chloroform and aqueous leaf extracts of C. tagal did not exhibit promising antimicrobial activity. Phytochemical screening of both plant extracts revealed the presence of carbohydrates, glycosides, tannins and resin. The chloroform and aqueous extract of A. corniculatam proved the presence of reducing sugar, cardiac glycoside, anthraquinone glycoside and saponin. Most extracts of C. tagal contained reducing sugar, saponins and alkaloids. The results of this study support the use of mangrove plants as a source of antibiotic substance against human pathogenic organisms.The study was aimed to analyze the phytochemicals and antimicrobial potentials of different fractions of Aegiceras corniculatam and Ceriops tagal, two mangrove plants of Bangladesh. Leaves of A. corniculatam and C. tagal were extracted using methanol by cold extraction method followed by partitioning with n-hexane, chloroform and the remaining part was considered as aqueous fraction. All fractions were screened for phytochemicals and subjected to Disc diffusion method to investigate antimicrobial activity against fourteen microorganisms including gram (+ve) (Staphylococcus aureus, Bacillus megaterium, Bacillus subtilis, Bacillus cereus, Sarcina lutea), gram (-ve) (Escherichia coli, Shigella dysenteriae, Vibrio mimicus, Vibrio parahaemolyticus, Shigella boydii, Pseudomonus aeruginosa) and fungi (Saccharomyces cerevaceae, Candida albicans, Asperagillus niger).The chloroform and aqueous extract of A. corniculatam exhibited moderate antimicrobial activity against all studied pathogenic microorganisms where n-hexane extract did not show any inhibitory activity.